If you have a GUI on your machine, you can likely just right click on the zip file and "extract here". If you are doing this at the command line, just change your directory into your download location and use the unzip command on the file that was just downloaded.

The download contains only one file. Once extracted, you should see a file simply named terraform. This is the binary of the application and it is all that is needed. Terraform is very simple in this way.

Now as root we just need to move this binary to an appropriate location. I like /usr/local/bin/ so we can do this: